When attempting to use a CambridgeSoft Excel Add-In, at some point I get: Cannot find ActivateWorksheet.
First, remove all of our Add-Ins from Excel. Then quit excel. Now uninstall all versions of our software using the Add/Remove Programs control panel. After our software has been removed, go to the Start menu, chose Run, and type regedit, then click OK. Delete the CambridgeSoft folders in HKEY_Local_Machine\Software and HKEY_Current_User\Software. Note that you may need Administrative privileges to delete items from the registry. After these CambridgeSoft folders have been deleted, restart the computer, reinstall our software, launch Excel, add the Add-Ins back and retest.